Well done to Sydney, Melbourne, Tokyo and Osaka for qualifying in the top ten!According to The Australian today, Australia’s and Japan’s two biggest cities both rank among the top 10 safest in the world, according to a new report from the Economist Intelligence Unit, which has listed 50 big cities by digital security, health security, infrastructure security and personal safety.The overall top 10 list looks like this:1. Tokyo (Japan)2. Singapore (Republic of Singapore)3. Osaka (Japan)4. Stockholm (Sweden)5. Amsterdam (Netherlands)6. Sydney (Australia)7. Zurich (Switzerland)8. Toronto (Canada)9. Melbourne (Australia)10. New York (USA)But on digital security neither Melbourne or Sydney make the top ten, with issues like cyber security and identity theft apparently taken far more seriously by cities like Tokyo, Singapore, New York and Hong Kong.As for the top 10 on health security? No Aussies in there either.This section measures factors like number of hospital beds to population and life expectancy.Infrastructure security, which is measured by quality of roads, and the number of deaths by natural disasters, is where Australia comes into its own.Melbourne finished just behind Zurich, with only 0.3 per cent separating the two, and Sydney wins the bronze ahead of Amsterdam and Tokyo.Finally, personal safety, which takes into account crime levels, had Melbourne at eight and Sydney at 10, with Singapore taking out the top spot.Ref: http://businessnow.theaustralian.com.au/2015/03/12/australia-dominates-in-worlds-safest-cities-rankings/